Real estate data.
Institutional grade.
$49/mo.
Rent estimates, market velocity, vacancy rates, home price appreciation, mortgage rates, and AI-computed investor signals for every ZIP in America — 9 data sources in one API call. Built on the 165+ Worker infrastructure powering PropTechUSA.ai.
Nine sources.
One response.
Zero compromise.
PropData aggregates 9 sources — Zillow ZORI, Realtor.com, Redfin, HUD Fair Market Rents, Census ACS, FHFA HPI, Census Building Permits, FRED macro data, and a proprietary Estimate Engine. Sources institutional investors pay thousands per month for, served in a single API call. Flat $49/mo. Zero per-call fees. Ever.
Fair Market Rents
The government's official rent benchmark — the same data used to set Section 8 voucher amounts. Every county in America. Studio through 4-bedroom. Ground truth for affordability analysis.
Observed Rent Index
ZORI — Zillow's smoothed median asking rent for all homes and multifamily. The most cited rent trend dataset in real estate. ZIP, metro, state, and national with 10 years of history.
Market Metrics
Monthly listing data: median prices, days on market, active inventory, new listings, price reductions, price per sqft. The pulse of the for-sale market at ZIP level.
Market Tracker
Sale-to-list ratio, % sold above list, days to pending, months of supply. The sharpest demand signal in public real estate data.
ACS Demographics
Vacancy rates, renter %, median income, rent-to-income ratio. Affordability context nobody else includes at this price.
FRED Macro Data
Mortgage rates, shelter inflation, national vacancy rate, and housing starts. National economic context alongside local market data — no other API at this price point includes this.
House Price Index
Quarterly home price appreciation by state and metro. The definitive government measure of home value change — used by mortgage lenders, Fed economists, and institutional investors.
Building Permits
Monthly new construction by unit type. The forward-looking supply signal — permits today become inventory in 12-18 months. Predicts rent pressure before it shows up in listing data.
PropData Estimate Engine
Weighted rent estimate model built on owned data. ZORI (40%) + Census ACS (25%) + HUD FMR (20%) + Redfin cap rate (15%). Returns low/mid/high range with confidence score. No third-party dependency. No scraping. Ours.
Built on Cloudflare.
Zero cold starts.
Global edge.
PropData runs on 9 dedicated Cloudflare Workers with a shared KV cache and Supabase backend. Every ingestion worker runs on its own cron — HUD weekly, ZORI and Realtor monthly. Data is cached at the edge and served in under 50ms anywhere in the world. This is the same infrastructure stack powering PropTechUSA.ai's 165+ production Workers.
163+ Cloudflare Workers
PropData runs on dedicated Workers inside PropTechUSA.ai's 165+ Worker production infrastructure. No monolith. Pure edge.
KV Edge Cache
All market data cached at Cloudflare's edge. 7-day TTL. Sub-50ms reads globally.
Supabase Canonical Store
15+ normalized tables. ZORI, Realtor, Redfin, HUD FMR, Census ACS, FHFA HPI — ZIP, state, and metro tiers. Indexed for fast queries.
API Key Auth + Rate Limiting
Tiered access. Free 50/hr, Pro 500/hr, Internal unlimited. Keys provisioned in KV instantly.
Merged data.
Computed signals.
Every /v1/market response includes a signals array — investor intelligence automatically computed from the merged dataset. Gross yield, market velocity, inventory pressure. Not just raw numbers. Answers.
Rent + listing + signals — one response
Fastest endpoint for rent-focused apps
For-sale market pulse at ZIP level
Proprietary weighted model · low/mid/high range + confidence score
Build anything.
Ship fast.
One endpoint. Nine data sources. Proprietary estimate engine. Zero per-call fees. Everything you need to build institutional-grade real estate tooling.
https://propdata-api-worker
.sales-fd3.workers.dev
application/json
AUTHENTICATION
Every request requires your API key. Pass it as a header (recommended) or query parameter.
ENDPOINTS
CODE EXAMPLES
'https://propdata-api-worker
.sales-fd3.workers.dev/v1/market
?state=MN',
{ headers: {
'x-api-key': 'YOUR_KEY'
} }
);
const data = await res.json();
// data.snapshot.market.hpi_1yr_chg
// data.snapshot.signals[0].value
RATE LIMITS
ERROR CODES
401
Invalid or missing API key
404
No data for this location
429
Rate limit exceeded — upgrade to Pro
500
Server error — contact support
Get your API key in 10 seconds.
Free tier. No credit card. No BS.
Why pay per call
when you can own it?
| Feature | PropData | RentCast | ATTOM | CoreLogic |
|---|---|---|---|---|
| Rent by bedroom (FMR) | ✓ | ✓ | — | — |
| Median asking rent trend (ZORI) | ✓ | ✓ | ✓ | ✓ |
| Days on market + inventory | ✓ | — | ✓ | ✓ |
| AI investor signals (computed) | ✓ | — | — | — |
| Pricing model | Flat $49/mo | Per call | Enterprise | Enterprise |
| No per-call fees | ✓ | — | — | — |
| Free tier available | ✓ | — | — | — |
| FRED macro data (mortgage rate, CPI, housing starts) | ✓ | — | — | — |
| Proprietary rent estimate engine | ✓ | ✓ | ✓ | ✓ |
| ZIP + State + Metro | ✓ | ✓ | ✓ | ✓ |
Simple pricing.
No surprises.
Flat monthly access. Your API key is live the moment you sign up. No credit card required for the free tier. Cancel pro anytime. Enterprise gets direct founder access.
- 50 requests per hour
- All endpoints
- ZIP, state, metro queries
- Investor signals included
- No SLA guarantee
- Community support
- 500 requests per hour
- All endpoints
- 36 months of history
- Investor signals
- Email support
- Cancel anytime
- Unlimited requests
- White-label available
- Custom data sources
- SLA + dedicated support
- PropTechUSA.ai integration
- Direct founder access
What developers build
with PropData.
One API key. Nine sources. The data layer for the next generation of real estate tools.
Stop paying per call.
Start building.
PropData is built by Justin Erickson / PropTechUSA.ai — the same infrastructure powering IntelligentHomeBuying.com, IntelligentLandlord.com, and Local Home Buyers USA. 165+ Cloudflare Workers in production.